Tsig

This tool can generate a TSIG key value (base64) very easily. TSIG is a secure method of authenticating clients making dynamic DNS update requests. The key value generation functionality is already built into Simple DNS Plus and Simple Failover.

SkDNS ActiveX Control is a DNS (Domain Name Service) ActiveX control that can be used for network diagnosing, troubleshooting, and monitoring. It allows developers to integrate the DNS protocol message sending capability into their applications.